1812164293 has 2 divisors, whose sum is σ = 1812164294. Its totient is φ = 1812164292.

The previous prime is 1812164279. The next prime is 1812164357. The reversal of 1812164293 is 3924612181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 966401569 + 845762724 = 31087^2 + 29082^2 .

It is a cyclic number.

It is not a de Polignac number, because 1812164293 - 2⁹ = 1812163781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1812164243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906082146 + 906082147.

It is an arithmetic number, because the mean of its divisors is an integer number (906082147).

Almost surely, 2^1812164293 is an apocalyptic number.

It is an amenable number.

1812164293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812164293 is an equidigital number, since it uses as much as digits as its factorization.

1812164293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 1812164293 is about 42569.5230534710. The cubic root of 1812164293 is about 1219.1744600944.

The spelling of 1812164293 in words is "one billion, eight hundred twelve million, one hundred sixty-four thousand, two hundred ninety-three".